r23346 - gnucash/trunk/src/business/business-gnome - Guard against bad parameter to gnc_plugin_page_invoice_summarybar_position_changed.

[Mike Alexander]

Author: mta
Date: 2013-10-28 15:17:00 -0400 (Mon, 28 Oct 2013)
New Revision: 23346
Trac: http://svn.gnucash.org/trac/changeset/23346

Modified:
   gnucash/trunk/src/business/business-gnome/gnc-plugin-page-invoice.c
Log:
Guard against bad parameter to gnc_plugin_page_invoice_summarybar_position_changed.

This avoids the crash in bug #710979 but doesn't fix the underlying problem.